/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package io.netty.example.socksproxy;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;

public final class SocksServer {
    private final int localPort;

    public SocksServer(int localPort) {
        this.localPort = localPort;
    }

    public void run() throws Exception {
        System.err.println("Listening on*:" + localPort + "...");
        EventLoopGroup bossGroup = new NioEventLoopGroup();//主线程池
        EventLoopGroup workerGroup = new NioEventLoopGroup();//从线程池
        try {
            ServerBootstrap b = new ServerBootstrap();
            b.group(bossGroup, workerGroup);
            b.channel(NioServerSocketChannel.class);
            b.childHandler(new SocksServerInitializer());
            b.bind(localPort).sync().channel().closeFuture().sync();
            b.option(ChannelOption.SO_KEEPALIVE, false);//设置不保持连接
        } finally {
        	//如果出现错误，则关闭主从线程池
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }
    }

    public static void main(String[] args) throws Exception {
        new SocksServer(1080).run();
    }
}
